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What does each short tandem repeat (STR) marker mean?

April 26, 2017Marker mean repeat short str tandem

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What does each short tandem repeat (STR) marker mean?

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By themselves, Y-chromosome DNA (Y-DNA) short tandem repeat (STR) markers from a Y-DNA test do not have any particular meaning. The value of testing Y-DNA STR markers comes from creating a Y-DNA signature (haplotype) with them and comparing that Y-DNA signature to others in a database. They are useful for genetic genealogy because your Y-DNA signature distinguishes your paternal lineage from others. They can then be used with Family Tree DNA’s comparative database to discover genealogical connections or historic ancestry.